<!DOCTYPE html>
<html>
    <head>
        <title>Issue 6540: Dynamically update selector groups when framed elements change - iframe</title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
        <style type="text/css">
        html, body {
            margin: 0;
            padding: 0;
        }

        div {
            width: 100px;
            height: 100px;
            background-image: -moz-linear-gradient(135deg, #788CFF, #B4C8FF);
            text-align: center;
            font-family: "Trebuchet MS",Helvetica,sans-serif;
            line-height: 100px;
        }

        div:empty {
            background-image: -moz-linear-gradient(135deg, #FF8C78, #FFC8B4);
        }
        </style>
    </head>
    <body id="test">
        <div>Text</div>
    </body>
</html>
